How do I ignore errors with mysqldump?

When dumping a database, I'm getting

mysqldump: Couldn't execute 'show create table `some_table`': execute command denied to user 'some_user'@'%' for routine 'some_routime' (1370)

and then the dumping just stops.

How do I make mysqldump continue when it runs into these sorts of problems? 10 minutes of Google has offered no help.

Here is the command I used:

mysqldump -u username -h localhost --port=4406 -p --databases database_name --skip-lock-tables --force > database_name.sql